CARBONIFEROUS VOLCANIC ROCKS OF SOMERSET 199 
in the lower part, numerous large fragments of lime- 
stone and some of grit in the upper part 
12. Coarse ash . . . ... 
1 1 . Brown ash very much decomposed and veined with calcite 
10, Limestone . . . . . 
9, Ash as above (No. 11), upper part with many fossils 
especially Edmondia ...... 
8. Reddish crinoidal limestone ..... 
7. Ash as above ....... 
6. Argillaceous limestone ...... 
5. Ash as above ....... 
4. Compact somewhat argillaceous limestone 
3. Ash as above '....... 
2. Limestone in bands from 3 in. to 6 in. thick, with 
partings of red shale, and at about a foot from the top 
one of green ashy material, top band of limestone very 
argillaceous ........ 
1. Massive limestone, with much chert to base of section . 
ft. in. 
11 6 
3 6 
1 2 
0 4 
22 0 
1 0 
2 0 
0 3 
3 6 
0 6 
11 0 
7 0 
95 6 
Third Exposure . — This lies some 200 yards further east. 
It is briefly described by Sir A. Geikie and Mr. Strahan, 
who refer to it as the most easterly of the coast stations. 
Their account is as follows : — 
“ The most easterly of the three coast- sections lies 600 
feet further along the shore. The upper part of the vol- 
canic series is there cut out by a fault, which brings the tuff 
against the limestone. The calcareous bands in the tuff 
are here much thicker and more numerous than they are 
further west, and continue to be crowded with organic 
remains. The volcanic material appears to be dying out 
in an easterly direction. Taking the whole evidence of 
this series of sections, we may reasonably conclude that in 
this instance also the eruptive vent lay somewhere to the 
west or north-west of the present shore-line.” 
The following is our reading of the section : — 
ft. in. 
11. Sandstone with vertical cylindrical bodies to top of 
section ........ 1 6 seen 
10. Brown ash much disturbed and calcite- veined about 17 0 
9. Somewhat nodular limestone . . . .24 
8. Argillaceous limestone . . . . .80 
